clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Feature: Visualization of Secondary Index Content
- Log more internal queries
- Add `GradualResizeProcessor` to limit effective parallelism for GROUP BY on small data volumes
- Restrict local object access only for user files path
- ReplacingMergeTree: Add `replacing_merge_cleanup_period_seconds` for automatic periodic cleanup of deleted rows
- `IN` with `UNION` subquery fails in analyzer with `distributed_product_mode = 'global'`
- Strange behavior with date compare (Date\DatetTme vs String(Date\DateTime))
- Sometimes the node freezes completely
- Fix uneven shard distribution in StorageCache::shardIndex
- Deprecate allow_experimental_query_deduplication feature
- Docs
- C++ not yet supported